What is the main idea of the passage? The passage suggests that oxygen remained in the atmosphere because ______.

admin2005-01-30 102

问题 What is the main idea of the passage?
The passage suggests that oxygen remained in the atmosphere because ______.

选项 A、it was caused by outgassing
B、it was heavier than hydrogen
C、hydrogen became trapped in limestone
D、rays from the sun created equal amounts of hydrogen and oxygen ______.

答案B

解析

转载请注明原文地址:https://kaotiyun.com/show/RByO777K

托福（TOEFL）

相关试题推荐

ReadingPassage1hasnineparagraphslabelledA-I.Whichparagraphcontainsthefollowinginformation?Writethecorrectletter
ReadingPassage1hasnineparagraphslabelledA-I.Whichparagraphcontainsthefollowinginformation?Writethecorrectletter
Answerthequestionsbelow.ChooseNOMORETHANTHREEWORDSAND/ORANUMBERfromthepassageforeachanswer.WhatwastheYapa
Theuniversityhasproduceda______toinformstudentsaboutthedifferentaccommodationoptionsavailable.SperrinHalls
Whatwasthestudentsurprisedtodiscoverhehadalotof?Onwhatbasisshouldthestudentpreparehisschedules?
He/Shethinksanoverheadprojectorisusuallyneeded.He/Shementionsthatjokescanbeusefulincontext.
SeverallargeearthquakesweretriggeredbytheeruptionofPinatuboon15thJune1991becauseofthe(36)ofthesummit.The
HowdidCharlesfeelabouthavingtochangeroutes?
(Fewsubstances)lockless(alikethan)coalanddiamonds,yetboth(arefashioned)(fromsame)elementalcarbon.
"PhysicalandChemicalPropertiesandChanges"→Sugar,water,andaluminumaredifferentsubstances.Eachsubstancehasspe

随机试题

水井压裂后，应在3个月内完成分层注水工作。()
Whiskeyandsoda_____alwaysmyfavouritedrink.
有关端坐呼吸的描述正确的是
病原体侵袭人体后，不出现或仅出现不明显的临床表现，但通过免疫学检查可发现对入侵病原体产生了特异性免疫反应，应称为
建设工程施工投标的程序中，投标计算后的工作应该是()。
“备案号”栏：()。“用途”栏：()。
如果出现流动性危机，商业银行采取的下列措施正确的有()。
企业变革的外部驱动因素是()。
设A是3阶实对称矩阵，特征值是0，1，2．如果α1=(1，2，1)T与α2=(1，－1，1)T分别是λ=0与λ=1的特征向量，则λ=2的特征向量是________．
Thedebateaboutproblemdrinkingandhowtostopitnowadayscentresmostontheworking-classyoung.Theyare【M1】______highly

最新回复(0)

What is the main idea of the passage? The passage suggests that oxygen remained in the atmosphere because ______.

托福（TOEFL）

ReadingPassage1hasnineparagraphslabelledA-I.Whichparagraphcontainsthefollowinginformation?Writethecorrectletter

ReadingPassage1hasnineparagraphslabelledA-I.Whichparagraphcontainsthefollowinginformation?Writethecorrectletter

Answerthequestionsbelow.ChooseNOMORETHANTHREEWORDSAND/ORANUMBERfromthepassageforeachanswer.WhatwastheYapa

Theuniversityhasproduceda______toinformstudentsaboutthedifferentaccommodationoptionsavailable.SperrinHalls

Whatwasthestudentsurprisedtodiscoverhehadalotof?Onwhatbasisshouldthestudentpreparehisschedules?

He/Shethinksanoverheadprojectorisusuallyneeded.He/Shementionsthatjokescanbeusefulincontext.

SeverallargeearthquakesweretriggeredbytheeruptionofPinatuboon15thJune1991becauseofthe(36)ofthesummit.The

HowdidCharlesfeelabouthavingtochangeroutes?

(Fewsubstances)lockless(alikethan)coalanddiamonds,yetboth(arefashioned)(fromsame)elementalcarbon.

"PhysicalandChemicalPropertiesandChanges"→Sugar,water,andaluminumaredifferentsubstances.Eachsubstancehasspe

水井压裂后，应在3个月内完成分层注水工作。()

Whiskeyandsoda_____alwaysmyfavouritedrink.

有关端坐呼吸的描述正确的是

病原体侵袭人体后，不出现或仅出现不明显的临床表现，但通过免疫学检查可发现对入侵病原体产生了特异性免疫反应，应称为

建设工程施工投标的程序中，投标计算后的工作应该是()。

“备案号”栏：()。“用途”栏：()。

如果出现流动性危机，商业银行采取的下列措施正确的有()。

企业变革的外部驱动因素是()。

设A是3阶实对称矩阵，特征值是0，1，2．如果α1=(1，2，1)T与α2=(1，－1，1)T分别是λ=0与λ=1的特征向量，则λ=2的特征向量是________．

Thedebateaboutproblemdrinkingandhowtostopitnowadayscentresmostontheworking-classyoung.Theyare【M1】______highly